CSS celanup, more use of lesscss and minor adjustments.

CSS cleanup on following My Account pages:
 - Review Details
 - Customer tag view
 - My Wishlist

Minor page.less adjustments.

CSS cleanup on product list/grid.
Improved Toolbar styles.

CSS cleanup and definitions for all blocks (page/block.less).

Layout.xml:
- Removed left.permanent.callout on col-left
- Removed right.permanent.callout on col-right
- Removed paypal.partner.right.logo on col-right
- <catalog_product_view>, <review_product_list>: added css/page/block.less

Modified some icons: i_asc_arrow.gif, i_desc_arrow.gif, pager_arrow_left.gif, pager_arrow_right.gif, i_toolbar-view-mode.png.
ChangeLog and Installation steps fix